US1532159A - Last - Google Patents

Description

April 7, 1925. 1,532,159

J. C. SCHELTER 1 1 Filed Oct. 28, 1924 2 Sheets-Sheet 2 FIG.4-

FIG'. 5

i A TTORNEYS.

Patented Apr. 7, 1925.

UNITED STATES PATENT (JFFICE.

JOHN C. SCHELTER, OF ROCHESTER, NEW YORK.

LAST.

Application filed October 28, 1924. Serial No. 746,423.

To all whom it may concern:

Be it known that 1, JOHN C. SOHELTER, a citizen of the United States, and resident of Rochester, in the county of Monroe and 7 of'this invention is to provide a construction in which a convex cylindrical bearing surface is provided on one-ofthe parts and a concave cylindrical bearing surface is provided on the other part, the two parts being connected together by a link or bonding member pivoted to both parts and the pivots of the bonding member being so positioned with reference to the center of the cylindrical bearing surfaces that such center, when the last is collapsed, lies below the line through the centers of the two pivots, and, when the last is expanded, lies above the line through the centers of the two pivots a resilient member being interposed between the bearing surfaces and acting as a friction producing device as well as a take up device. Another object of the invention is to provide a last having two parts connected together by a bonding member and having cooperating bearing surfaces with a resilient friction producing device interposed between them. A still further object of the invention is to provide a last having its two parts connected by a rigid bonding member with a resilient take-up device between said last parts.

To these and other ends, the invention consists of certain parts and combinations of parts, all of which will be hereinafter described, the novel features being pointed out in the appended claims.

In the drawings:

Fig. l is a fragmentary sectional view of one embodiment of the improved last in an expanded condition;

Fig. 2 is a horizontal section through the improved last as shown in Fig. 1;

Fig. 3 is a view in side elevation of the "ime embodiment in collapsed condition;

Fig. 4 is a view similar to Fig. 1 of another embodiment of the invention;

Fig. 5 is a view of the inner end of the fore part illustrated in Fig. 1; and

Fig. 6 is a perspective view of the resilient member arranged between the two lasts for producing frictional engagement between them and for taking up wear.

Referring to the embodiment of the in vention illustrated in Fig. 1, 1 indicates the fore part and 2 the heel part. These parts, in this instance, have cooperating bearing surfaces which permit the parts to move relatively to each other for the expansion and collapsing of the last. In this instance, the heel part has a convex cylindrlcal bearmg surface 8 formed at its front portion, the center of this bearing surface being situated at X on the fore part, and

the fore part has a convex bearing surface 4, the center of which is also at X on the fore part. To hold the parts during their relative movement, a bonding member 5 is employed preferably in the form of a rigid tubular link which in Figs. 1 to 3 and 5 is pivotedat 6 in the heel part and at? in the fore part, the link extending into the opposed ends of the last parts and such last parts being cut topermit a relative movement between the link 5 and the part in which the link is mounted. When the last is in an expanded condition, as shown in Fig. 1, the pivotal point X lies above a line c -y drawn through the centers of the pivots 6 and 7, whereas when the last is in a collapsed condition, as shown in Fig. 3,

the pivotal point X lies below the line yy drawn through the centers of the pivots 6 and 7 As a consequence, when the last is expanded, there is a tendency to draw the 'two surfaces 3 and 4 together and when the last is collapsed, there is a tendency to separate such surfaces. In order that this bind- 'ing'. of the'surfaces 3 and 4 on the expansionfof the last will not become loose due to the wear after the last has been used for an extended period, a combined take-up device and friction producing device is in terposed between the cooperating surfaces and to this end the surface 4 is notched or cut away to provide a seat 8, and, in this seat, the resilient device is arranged. This resilient device, in this instance, is in the form of a concavo-convex resilient plate 9, the radius of which is shorter than the radius of the surface 3 so that the central portion of this plate lies in spaced relation to its seat, while the edges of the-plate eugage the seat and the plate is held against movement by the sides 10 of the seat. In order that this plate may not interfere with 'the surface 3, at the" same time,

the movements of the last part, it has a slot or opening 11 through which the bonding member 5 extends, this opening being of suiiicient size to permit the bonding member to swing on the fore part.

t is apparent that with this embodiment, when the last is swung from collapsed condition to an expanded condition, the surface 3 will be moved toward the center-X ant will place'the-resilient deviceor plate 9 unproducing friction in der tension thereby the pivots 6 and 7 will be'carried above the center X,

and this tension on the plate tends to hold thelast'in an expanded condition.

' In the 'embodimentof theinvention shown in Fig. 4, the 'partsare the same-exceptthat Y the center X" of the cooperating surfaces 8 and 4 of the last partsis concentric with the center of the pivot 7. As a consequence, the bonding memberfi may be socured by two pins 6 and 6"-in the'heel part 2 and will swing only relatively "to" the fore part. I With "this arran'gement'the yielding plate 9 will be maintainedconstantly LIDdGI tEIISlOH and will hold'the lastparts drical bearing surfaces of' large area betweenlast parts which-are connected together by a bonding memberpivoted to both parts, the center of the cylindrical bearing surfaces on the two last parts being so positioned that, when the last is collapsed, this center will lie below a line intersecting'both pivots and when the last is expanded, this center will lie above such line so that in'expanded condition the bondingineniber tends-to hold the last against collapsing. A resilient curved plate seated on one of ti e cooperates with another bearing surface to support the bonding memberin holding the last expanded, and at-thesame time produces friction between'the last parts and takes up for all wear.

ll hat I claim as my invention and desire to secure'byLetters Patent is:

1. A last comprising a forepart having its rear end cut toform a convex cylindrieal bearing, a heel part having its forward portion formed with a concave cylindrical bearing cooperating with the ey bearing cooperating cylindrical bearing surfaces member lindrical bearing on the fore part, a bonding memoer pivoted to the heel part and the fore part, the center of the cylindrical bear ings on the heel part and the fore part lying above a line intersecting the centers of the pivots of the bonding members when the last is expanded and below said line when the last is collapsed, one of said cylindrical bearing surfaces having a seat therein, and a resilient member arranged in said seat to cooperate with the other cylindrical surface.

2A last comprising a fore part having its. rear end cat to form a convex cylindrical bearing, a heel part having its forward portion formed with a concave cylindrical with the cylindrical bearing on the fore part, a bonding member pivoted to the heel part and the fore part, the center of the cylindrical hearings on the heel part and the fore part lying above a line intersecting the centers of the pivots of the bonding members when the last is expanded and below said line when the last is collapsechthe fore part having a seat therein, and a concave-convex resilient plate arranged on said seat and having an open ing through which the bonding member extends, the curvature of the plate being different from that of the cylindrical bearing surfaces.

3. A-last comprising a fore part and a heel part having cooperating bearings per- .mitting' the relative swinging of the parts,

a rigid bonding member connected to both parts and permitting the swinging of the parts on said bearings, and a resilient member arranged between the bearings of the fore part and the heel part.

4:- A: last comprising a fore part and a .heelpart having cooperating bearings permittmg' the relative swinging of the parts, a rigid bonding member'connected to both parts and permitting the swinging of the parts on said bearings, and a resilient member arranged between the bearings of the fore part and the heel part, said resilient member having an opening through which the bonding member extends.

I 5. A last comprising a fore part and a heel part having cooperating bearing surfaces formed thereon to permit the swinging of the parts relatively to each other, a rigid linl: having a fixed pivotal connection both to the fore part and to the heel part, and friction producing means interposed between the bearing surfaces of the two parts.

(3. A last comprising a fore part and a heelpart, cooperating bearing surfaces on the fore part and the heel part, a bonding connecting said parts to permit them to turn on sait surfaces, and a resilient member interposed between the surfaces.

i t'm lil) "7. A last comprising a fore part and a heel part, cooperating bearing surfaces on the fore part and the heel part, a bonding member connecting said parts to permit them to turn on said surfaces, and a resilient member interposed between the surfaces, said resilient member having an opening through which the bonding member turns.

8, A last comprising a fore part, a heel 10 part, a link pivotally connected to the fore part and also to the heel part, and pivoting connection between the fore part and the heel part having a resilient member formed with an opening through which the link eX- 15 tends.

JOHN C. SCHELTER.

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